Proteomic analysis reveals the mechanisms involved in the enhanced biocontrol efficacy of Rhodotorula mucilaginosa induced by chitosan

Results of the present study indicate that the biocontrol efficacy of the yeast against gray mold of strawberry was greatest when the yeast was cultured in a medium containing 0.5% chitosan for 24 h before use

Ning Gu; Xiaoyun Zhang; Xiangyu Gu; Lina Zhao; Solairaj Dhanasekaran; Xin Qian; Hongyin Zhang

2020

Scholarcy highlights

  • R. mucilaginosa induced by chitosan for 24 h showed the best biocontrol efficacy
  • The biocontrol efficacy of the yeast, Rhodotorula mucilaginosa against postharvest diseases of strawberries can be significantly enhanced by culturing the yeast in a medium containing chitosan
  • The molecular mechanisms involved in the enhanced biocontrol efficacy of R. mucilaginosa, have not been comprehensively explored
  • Results of the present study indicate that the biocontrol efficacy of the yeast against gray mold of strawberry was greatest when the yeast was cultured in a medium containing 0.5% chitosan for 24 h before use
  • Proteomic and bioinformatic analyses revealed that proteins involved in growth and reproduction, energy metabolism, antioxidant response, response to abiotic stress, and degradation of pathogen cell walls were all up-regulated by chitosan resulting in the enhanced antagonistic activity of R. mucilaginosa against B. cinerea
  • The present results provide a theoretical reference for further study of the molecular mechanisms involved in the improvement of biocontrol efficacy of antagonistic yeast by elicitor molecules and provide a novel approach for improving biological control of postharvest diseases

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